DUBLIN NATTTKAL HISTORY 80CIETT. 57 



The Bpecimen referred to was exhibited ; its most remarkable cha- 

 racters were : the base, pentangular in. outline j the summit, instead of 

 being flattened, as in all the typical forms of Hchinus lividus, is produced 

 to a point, so that its height nearly equals its transverse diameter. 

 The arrangement of the pores and tubercles of the amhulacral plates are 

 identical with that in specimens of E. lividus from Valentia Island, but 

 the ovarian plates and nucUus differ from those of Echinus lividuSf and 

 are, on the other hand, identical with the form of these parts in -fiV^Amw 

 aphcera ; in fact, in many of its characters this specimen is intermediate 

 between these two species. 



The specimen sent up unfortunately wants the spines, so that it is 

 doubtful whether it may not be a species distinct from either JS. Uvidus 

 or £, sphcera. An Echintu Iwidtia, pentangular in form, is recorded in 

 Forbes's ** British Starfishes," page 168, but no details are given, and 

 the pentangular E. sphcera is well known. 



Professor Kinahan also exhibited a very fine living specimen of the 

 spiny crossfish, UraHer glacialia (Link.), from Dalkey Sound, which had 

 been sent to him by D. J. Corrigan, M. D., M. K. L A. This specimen 

 was remarkable for its colour, the species is common in Dublin Bay, in 

 from 10-30 fathoms ; its occurrence there was first recorded from a spe- 

 cimen presented to this Society by Dr. Corrigan in 1863. There is a 

 very remarkable variety (?) of Uraster rubenSf which occurs abundantly 

 when dredging on the Kish Bank, which may be mistaken for this spe- 

 cies, and which suggests the question whether two species have not been 

 confoimded under the name of Uraster glacialis in our lists. The cha- 

 racters of the papillae around the spines at once marks out the true 

 U. glacialis; in the variety spoken of the spines are perfectly naked, 

 whilst in U, glacialia they are surrounded by a fleshy mass, crowded at 

 its summit with numerous small spinules. 



The Chairman, under the new rules, declared the following duly 

 elected :^— 



Joseph Rees Greene, Associate Member. 



"William Kennedy, Limerick, Corresponding Member. 



W. Lecky, Yalentia, Corresponding Member. 



The Session was then declared closed, and the Society adjourned till 

 November. 



